Scientific basis in using lichens as Bio-indicators of SO2 content in the air environment in some provinces and cities in north of Vietnam

The diversity indices (d, H, J) of lichens have a less close linear relationship with the AQI_SO2 index as shown by the low correlation coefficient. This result shows that lichen biodiversity indices may have a nonlinear relationship with the AQI_SO2 index. These data are considered the scientific basis of research on using lichens as biological indicators of the air environment, specifically indicators of SO2 content in the air in some provinces/cities in Northern of Vietnam.
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Scientific basis in using lichens as Bio-indicators of SO2 content in the air environment in some provinces and cities in north of Vietnam